Improvement in inking apparatus for printing-presses



F. MACDONALL INKING APPARATUS Pon PRINTING PRESSES.

No.188,386 Patented Maroh13,1877.

Wmme@ N.PErF.Rs. PHOTO-UTHOGRAPHER. WASHINGTON, n cA FRANKLIN MACDONALD, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALFv OF HIS RIGHT TO ISAAC SMITH, OF SAME PLACE.

IMPROVEMENT IN INKING APPARATUS FOR PRINTING-PRESSES;

Specication forming part of Letters Patent No. 188,386, dated March 13, 1877; application tiled December 8, 1876. Y

T0 all whom it may concern:

Beit known that I, FRANKLIN MACDONALD, ot' the city, county, and State of New York, have invented certain new and uset'ul Improvements in In king Apparatus for Printing Presses; and Ido hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, which forms part of this specification: y

This invention consists in certain novel constructions, aild combinations of means for automatically operating the reciprocating carriage of inking-rollers in lithographie and other printing-presses, whereby the working ofthe press is expedited and rendered less laborious, and the inking ot' the stone or other printingsurface is performed with the most perfect accuracy and efficiency.

Figure 1 represents a partly sectional side view of a lithographie printing-press, in part, with my improved means for operating the carriage of inking-rollers in position for running said rollers'over the stone, and as in the act of their passing over the latter in a for ward direction, as indicated by the arrow x. Fig. 2 is a plan of the same, under alike condition of parts; and Fig. 3 a vertical central longitudinat section, in part, showing the means for operating said carriage of inkingrollers as reversed and as fully run back.

A is the frame ot' the press formed with rails b b, on which the carriage B of inkingrollers c c reciprocates, and on which said carriage is supported by wheels d d. This carriage Bis pushed in the direction indicated by the arrow x over the full length of the stone C, to be inked after said stone has been suitably dampened, which dampening may either be doneby hand or by suitable dampcning appliances attached to the carriage B, and arranged in front of the inking-rollers. The carriage B of inking-rollers is then returned or drawn back by the pole Gr, the sheet to be printed laid upon the stone C, and the latter run under the printing or impression-bar, roller, or other impression device, after which the stone is returned to its normal position to be again dampened and inked after the printed sheet has been removed. The

inking-rollersc c are supported in slotted bearings e e, whereby they are free to rise on to the stone when inking the latter, and are caused in the backward portion of the travel of the carriage to drop and comev in contact with suitable ink-distributing rollers, the rails b b being extended far enough backto allow the carriage ot' hiking-rollers to completely clear the stone.

The carriage B is intermittently reciprocated to operate, as hereinbefore described, as follows: Mounted on the main frame A, at or near. the back of the machine is a supplementary frame, D, which carries the tripping and reversin g devices of theinking-roller carriage B. These devices consistin part oftluted `or roughened reversing-rollers E E', geared together by spurwheels ff, which, although here shown ot' the same diameter, may be of different diameters,to give the inking-roller carriage .a 'quicker back than forward movement. These rollers, either one of which may be driven by pulleys g g, and a band, h, are caused to alternately bite under or against a push-anddraw bar or pole, G, connected in a free upwardly and downwardly working manner at its forward end by a pin, t, with the inkngrollercarrage B. Pivoted to the frame D, at

It, is a rocking yoke or frame, H, which carries pressure-rollers I I. These rollers may either be plain or roughened, and are arranged i Vor more downwardly projecting arms or toes,

K, which, accordingly as the rocking yoke H is tipped on its fulcrum k, are thrown to one side or other of a retaining-spring, L, which serves to hold either pressure-roller I or Il in contact with the bar or pole Gr, that may be plain, toothed, or,roughened to engage with the rollers E I or E I.. Said bar or pole Gis cut away at l, so that when run back to its extreme limit, as shown in Fig. 3, the operating roller E ceases to act upon said bar or pole, and causes the action of the latter to be suspended till it is required to run the car- ATENT GFFICE.

riage B of inking-rollers forward andv backward again over the stone C. To move said carriage B in a forward direction over the stone, the yoke H is tippc -as, for instance, by levers m n, operated y hand-to cause the pressure-roller I' to bear down on the pole Gr back ,of the fulcrum 7c, to relieve the pole from contactv with the rollers E I, and to p ut it in contact .with the rollers E' I'. After the carriage B of inking-rollers has been thus .run forward over the stone,.a tripping-button, r, on the back `end of the bar or pole Gr, strikes .a stop or roller, s, on the rear end of the yoke II, and tips or tilts it in a reverse direction, to bring the bar or pole G down on the reversing rotating feed-roller E, and the pressure-roller I down on the top of said pole. lThe carriage B of inkingrollers is then run back till the reduction lin the bar cornes over the reversing-roller E. The rocking yoke H, with its attached pressure-rollers II', forms a tripping device of the bar or pole G. In this way, or

` by these means, the carriage of inkingro1lers is automatically operated, tripped, and re- .vers'ed to ink the stone or other printing-surface as required.

, I claiml. The combination of the oppositely rotatvided with a tripping-button, r, in combination with the stop or roller s on the rocking tripping device H, which carries the pressurerollers I I', substantially as specified.

4. The rockin gtrippin g device H, constructed of -a yoke arranged to work on a pivot, k, and having pressure-rollers I I' on opposite sides of said pivot, also provided with one or more locking arms or toes, K, and one or more retaining-springs, L, for operation in relation with the reversing-,rollers E E', and push bar or pole G, essentially as described.

FRANKLIN MACDONALD. Witnesses:

E. B. SPERRY, FRED. HAYNES. 

